Muffle furnace or oven.



Patented .Iuly I7, |900..

L. H. W. REB'QUT. MUFFLE FUBNACE 0R UVEK.

(Application led Nov. 9. 1899.)

2 Sheets-Sheet l,

(No Model.)

/N VEN Tok W/TNESSES:

ATTORNEYS No. 653,8I9.

Patented July I7, |900.

L. H. W. REGOUT. MUFFLE FURNAGE 0H UVEN.

(Application filed Nov. 9, 1899.)

2 Sheets-Sheet 2 (Ng Model.)

W/ TNE SSE S.'

ATTORNEYS TN: mams mais cc. How-umm wAsHwn-rou. n. c.

Unrrnn STATES PATENT Orrien.

LOI'IS HUBERT WILLEM REGOUT, OF MAESTRIOHT, NETHERLANDS. i'

MUFFLE FURNACE OR OVEN.

SPECIFICATION 'forming part of Letters Patent No. 653,819, dated July 17, 1900.

Application filed November 9, 1899. Serial No. '736,412x (No model.)

To @ZZ whom 'it may concern:

Be it known that l, Louis HUBERT WILLEM REGOUT, engineer, a subject of the Queen of the Netherlands, residing at Stationstraat 32, Maestricht, in the Kingdom of the Netherlands, have invented certain new and useful Improvements in or Relating to Muftle Furnaces or Ovens, of which the following is a specification.

The present invention relates to a muflie furnace or oven for continuous working with direct base-firing.

In the ordinary annular munie-furnaces a direct base-firing is properly not possible, owing to the arrangements of the wheels required for the movement of the rotating annulary plate underneath the muflle and because this annular plate forms at the same time the bottom of the Inutile.

The present invention refers to muflie furnaces or ovens in which direct base-firing is made possible, while continuous working by means of an annular plate or support is not interfered with. For this purpose the bottom of the muftle is solid and in every part constructed of fire-resisting material, with a few small openings at intervals, from which project cast-iron rollers for the rotating bottom plate orsu p port. These rollers,howe`ver, are not placed directly over the tire-space. The furnace consists of an annular passage the dimensions of which depend on the material to be treated. A part of the furnacem t'. e., the muftle*in which the burning process is carried out is directly heated, and this part is constructed entirely of lire-resisting stone or material. The parts which serve, respectively, for the preliminary heating and for the cooling of the articles after burning are preferablyT constructed partly of hre-resisting material and partly of metal. The fire from the grate comes in direct contact with the bottom of the muile. The heating-gases ascend by way of lat-eral passages and surround the inutile before they are allowed to escape through the chimney.

The muflle-furnace is provided with a continuous rotarybottom arranged a little above the bottom of the muftle. This traveling surface is supported on iron rollers and consists of a grating of cross bars or plates, on which the articles to be treated are placed. By rotating the traveling support the articles pass first through the space where the preliminary heating is effected, then through the muflie, and afterward through the cooling space, from which they pass on and return to the original position and can be removed from the furnace.

The new mufle-furnace'is represented in the accompanying drawings.

Figure l is a planview, partly in section, of the mufiie-furnace; and Fig. 2, a vertical section through the furnace at the firingplace, but on a larger scale than Fig. l.

, The annular furnace 0 consists of a section BO, which is exposed directly to the strong ire,'and consequently is constructed exclusively of fire-resisting material, two sections AB and CD,adjoining the Iiringsection,which are exposed to a less-intense heat and are also constructed of hre-resisting material, the section DE before the .preliminary-heating section DO, and which is made of sheet-iron or plates, as well as the section AF for the cooling, and finally of a section FE, which is left open. The section EF serves for the introduction and removal of the charge of the articles to be treated. The next two sections ED and DO serve for the preliminary heating, the next section BO for the burning, and the next two, BA and AF, for the cooling of the articles treated. The firing space or grate a is beneath the muiiie g, Fig. 2. The flames produced on the grate-bars I) come in contact directly with the bottom c of the muftle. The heating gases then ascend through passages d on both sides of the chamber into the space c above the mufde and envelop completely the surface of the muile up to the chimney f, passing through the passages 25, Fig. l, which are arranged around the muftle, and finally escaping by the chimney. In the annular furnace there is an annular bottom plate or support comprising steel rails or bars 7L, which are connected at intervals by ties or rods 'i and covered with bars or plates n. The steel rails are supported on rollers lo, which are mounted on axles Z, which are capable of rotation in stationary bearings m and are so arranged that the axles and bearings are not exposed to the heat of the fire. tom support extending through the whole The rotatory annular bot furnace is thus produced. On this traveling support are placed the articles to be treated, bars or guards p, Fig.. 2, being arranged at the sides to protect the articles from falling over. The traveling support, together with the articles standing on it, is then'moved onward by means of toothed-Wheel gearing q, Fig. 1. The bottom c of the muffle g is solid and constructed of fire-clay plates, and there are only in a few places at intervals small passages orrecesses through which the rollers k project into the heating and cooling spaces AB, BO, and CD. As shown in Fig. 1, these recesses are absent from the upper part of the fire-chamber a. The operation is as follows: After the articles to be treated have been placed in the part FE on the supporting-surface they are introduced in consequence of the rotary movement imparted to it rst into the part DC of the furnace, which is not directly heated, where they are preliminarily heated. On further rotation the articles are introduced into the section CB, in which the firing process is carried out, and they remain there until the operation is finished, during which time the articles already in the next forward part BA, which were previously in CB, have time to cool and the articles in the front section are completely cooled, after which the completely-cooled articles are removed in the part FE. In the corresponding parts cooling can be accelerated by suitable means. This arrangement therefore unites the advantages of a continuous working with that of a direct base-firing. The heating is produced gradually, and cooling is carried out in the same way until the articles have reached the place where they 4are removed, in consequence of which arrangement th'e cracking of even large objects need not be apprehended. This manner of utilizing the iii-ing material is very advantageous and produces an economy of between seventy and eighty per cent. as compared With the old mui'le systems.

The new mufiie-furnace is especially adapted for burning in colors, and gold on china, earthenware, stoneware, glass, and enameliron patterns.

I claim- 1. An annular mulfle-furnace comprising an annular rot-atory support with means for rotating the same, a heating-*chamber at one portion of the annular mufde-furnace arranged below the support, a muiile abovethe heating-chamber, a preliminary-heating secltion of the furnace and a cooling-section, substantially as set forth.

2. In an annular mufile-furnace, an annular rotatory support comprising a pair of rails connected at intervals by cross-ties, a series of Wheels upon which said rails are supported and a iioor laid upon said rails on which the articles to be baked are placed, and means for rotating the annular support substantially as set forth.

3. In an annular mufiie-furnace of the kind described, the combination with the heatingchamber of the stationary supporting-Wheels having axles located outside said chamber, the bearings to said axles being arranged on the outside Walls of the mufde-furnace, substantially as described.

4. An annular mufiie-furnace with continuous working and direct base-firing characterized by the arrangement of an annular rotatory support, on which the articles to be treated are placed, said support comprising a pair of annular rails united by cross-ties and provided with a suitable door, the rails being supported on rollers arranged at inter vals on both sides of the furnace and in such manner that the heating-gases produced un derneath the muffie and passing around the inufe do not touch the support and the ro1l ers, and means for rotating the traveling support so that the articles to be heated. pass successively through the preliminary-heating space, then through the mufde and then through the cooling-space of the furnace, substantially as described.

5. In an annular mufle-furnace, a heatingchamber a a mufde c, a rotatory annular bottom support, rails h, supporting-Wheels 7c, combustiongas passages d and substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

LOUIS HUBERT WILLEM REGOUT.

XTitnesses:

HENDBIKUS JOHANSUS ALBnRrUs PniLirUs Ooms, LEONARD Koor. 

